TCP SYN (p0f)

4:54+10:0:1460:mss*29,9:mss,nop,ws:df,id+:0

first seen 2026-10-28 05:13 · last seen 2026-10-30 02:41 · JSON

Last 7 days (2 observations)

Distinct clients per day (last 30 days, peak 1/day)

Distinct clients are counted by IP-hash per complete UTC day — unlike observation counts this is insensitive to one chatty client, but NAT merges clients and address rotation splits them.

Decomposed attributes

IP version4
Initial TTL54+10
Options length0
MSS1460
Window sizemss*29
Window scale9
Options layoutmss,nop,ws
Quirksdf,id+
Payload class0

Co-observed signals

Signals from other families seen in the same observation. A fingerprint spread thinly across many lower-layer signatures is a classic inconsistency signal.

TLS ClientHello (JA4)

fingerprintco-occurrences
t12d130600_2d7513195f68_e51b7354d87f2

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr040000_e1d2031bdfea_000000000000_0000000000002

TCP SYN (JA4T)

fingerprintco-occurrences
42340_2-1-3_1460_92

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
US · United States2

Network (ASN)

fingerprintco-occurrences
AS22168 · The Shadowserver Foundation, Inc.2

TLS supported groups

fingerprintco-occurrences
0017,0018,00192